Flora of North America species comparison

1 or 2–4, loosely clustered, glabrous or sparsely tomentose proximally.

1 (striated, frequently hollow, often pink- to purple-tinged), glabrous or leaf axils sparsely tomentose.

petiolate;

blades lanceolate to narrowly elliptic or oblanceolate, 30–60+ × 10–20+ mm, bases tapering, sometimes obtuse, margins subentire to dentate or serrate.

(and proximal cauline) obscurely petiolate;

blades obovate to oblanceolate, sometimes lyrate (lateral lobes to 5 pairs, terminal lobes larger than laterals), 50–150+ × 10–30+ mm, bases tapering, ultimate margins crenate to irregularly undulate.

gradually reduced (proximals petiolate, sublyrate; mids sessile, not clasping, lanceolate, dissected, incised, or lacerate; distals sessile, bractlike).

gradually reduced (weakly clasping, similar to basal).

usually bracteate, sometimes ebracteate, glabrous.

bracteate, glabrous or bases tomentose.

0, 8, or 13;

corolla laminae (pale yellow) 5–10+ mm.

(8–)13;

corolla laminae 7–9 mm.

50–65+;

corolla tubes 2–3 mm, limbs 2–3 mm.

35–50+;

corolla tubes 2.5–3.5 mm, limbs 2–3 mm.

13 or 21, green, 5–8+ mm, glabrous.

(13–)21, green, 5–7 mm, glabrous.

inconspicuous.

conspicuous (bractlets 2.5–4 mm).

2–10+ in loose or compact, corymbiform arrays.

8–30+ in umbelliform or cymiform arrays (robust plants with multiple arrays).

1–2 mm, usually glabrous, sometimes hispidulous on ribs;

pappi 3.5–4.5 mm.

1–1.5 mm, sparsely hirtellous on ribs or glabrous;

pappi 3–4 mm.

= 44, 46, 92.

= 46.